/// <summary> /// Invoked when application execution is being suspended. Application state is saved /// without knowing whether the application will be terminated or resumed with the contents /// of memory still intact. /// </summary> /// <param name="sender">The source of the suspend request.</param> /// <param name="e">Details about the suspend request.</param> private async void OnSuspending(object sender, SuspendingEventArgs e) { IPageNavigator pageNavigator = ServiceLocator.Instance.Resolve <IPageNavigator>(); var deferral = e.SuspendingOperation.GetDeferral(); await pageNavigator.SaveAsync(); deferral.Complete(); }